Starting life as a couple while raising step kids and cohabiting with a friend
No, you certainly are not unreasonable to ask your friend to move out. In fact under the circumstances she should have offered knowing you both have little time for each other.
Your approach with your step children is admirable, to try and bond with them and give them time with their natural parent- we’ll done there. I’ve been a step parent twice and it’s a delicate situation.
So, sooner rather than later get her to move, I wouldn’t let it drag on- make it days not weeks.
Finally consider getting your partner to set in concrete visiting rosters for the kids or at least reaffirm with their mother that the weekend access won’t be changed.
I agree totally with white knight. You are well within your social rights to expect your girlfriend to give you some space. In fact, most people would have politely declined your generous invitation to share house.
Sit your friend down and be very clear you need privacy and therefore she will have to leave. The covid 19 does make it awkward but I’m sure she will be able to work it out.
I empathise with you. I have 3 kids, he has 2 and his sis lives there. The only alone time is when we go out on a Sunday which is we can't now. His kids are teens like 2 of mine so always in their rooms but his sis wLks5in and out and I interrupts conversations or takes over with her own stuff so they end up chatting. You're not out of line. Boundaries are needed and your friend should not expect to be invited to dinner etc.